Facetious question but for a genuine response: Firefox yes, your distro's Chromium package yes, but Chrome proper is still refusing to enable it though (they allowed you to toggle it for a bit after 88 the retracted that in 91).

Not being facetious at all. I'm replying to "there really isn't a good excuse to stay with Microsoft." and last I checked browser video acceleration on linux with nvidia was still broken, no matter whose fault that is.

I'd love to use linux but It's hard to say everyone should use linux when in 2021 not everyone even has proper video acceleration.

Yes. Download them with youtube-dl and use whatever hardware-accelerated video player you like. (Bonus: Youtube can no longer steal them out from under you at the behest of copyright trolls, because they're on your harddrive.)